A direct-injection shaved ice evaporator and ice making machine

Abstract

A direct-injection slush ice evaporator comprises a drum (1) and a refrigerant pipe (2), wherein the refrigerant pipe (2) is provided with a first section (3), an inner part (4) and a second section (5) in sequence from one end of the drum (1) to the other end; the first section (3) is connected with the first part (4.1) to form an inlet channel (22), the second part (4.2) is connected with the second section (5) to form an outlet channel (23), the first part (4.1) is provided with an outlet (24), and the second part (4.2) is provided with a discharge port (25); the non-direct connection means that the refrigerant is directly injected into the drum (1) through the inlet channel (22) and the outlet (24), and the refrigerant absorbs heat and vaporizes before entering the outlet channel (23) through the discharge port (25) to be discharged from the drum (1); the direct-injection slush ice evaporator allows the refrigerant pipe to directly pass through the interior of the drum, thereby reducing mutual interference and facilitating the improvement of ice making efficiency; an ice making machine is also provided, which uses the above-mentioned slush ice evaporator to improve ice making efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of ice making machines, in particular to a direct-spraying shaved ice evaporator and an ice making machine. Background Art

[0002] The slush ice evaporator is the core component of the ice maker for making slush ice. At present, there is a direct-injection slush ice evaporator, such as the technical solution disclosed in the invention patent application with application publication number CN116717932A, which discloses a household snow-making machine evaporator. The household snow-making machine evaporator includes a roller with a cold air chamber inside, and also includes a main shaft, a left fixed cover, and an oil seal cover. The main shaft extends left and right through the left fixed cover and the oil seal cover, and the right end of the oil seal cover is fixed to the left end of the roller. The left fixed cover is located on the left side of the oil seal cover, and a first bearing is installed between the left fixed cover and the oil seal cover. The interior of the main shaft is a hollow structure for the capillary to extend into. The right end of the main shaft extends into the cold air chamber of the roller. A capillary fixing piece is fixed to the right end of the main shaft. The right end of the main shaft is provided with an air outlet connected to the cold air chamber. An oil seal is installed between the inner wall of the oil seal cover and the outer wall of the main shaft. The right end of the roller has a rotating shaft extending left and right. The rotating shaft is covered with a right fixed cover, and a second bearing is installed between the inner wall of the right fixed cover and the outer wall of the rotating shaft. The above-mentioned evaporator of the household snow-making machine has a relatively complex structure. In addition, it is necessary to additionally set a capillary fixing piece and a corresponding capillary. The capillary and the exhaust are in the same main shaft, and the main shaft needs to be suspended.

[0003] The applicant will propose a novel direct-injection shaved ice evaporator in the present disclosure, in which the refrigerant pipe directly passes through the inside of the drum to reduce mutual interference, which is beneficial to improving the ice-making efficiency. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to propose a direct-injection slushy ice evaporator, to allow the refrigerant pipe to directly pass through the inside of the drum, to reduce mutual interference, and to help improve ice-making efficiency; and to propose an ice-making machine, which adopts the aforementioned slushy ice evaporator to improve ice-making efficiency.

[0005] The technical solution of the utility model is: a shaved ice evaporator, including a drum, the outer periphery of the drum is used for ice formation, and also includes a refrigerant pipe, the refrigerant pipe is used for circulating refrigerant, the refrigerant pipe is extended from one end of the drum to the other end, and the refrigerant pipe is provided with a first section, an inner part and a second section in sequence from one end of the drum to the other end, the first section is rotatably sleeved with the end of one end of the drum, the second section is rotatably sleeved with the end of the other end of the drum, and the inner part is located in the drum; the inner part includes a first part and a second part which are not directly connected, the first section is connected with the first part to form an inlet channel, the second section is connected with the second section to form an outlet channel, the first part is provided with an outlet, and the second part is provided with a discharge port.

[0006] The non-direct connection means that the refrigerant is directly sprayed into the drum through the inlet channel and the outlet, and the refrigerant absorbs heat and vaporizes, and then enters the outlet channel through the discharge port to be discharged from the drum.

[0007] After adopting the above structure, the utility model has the following advantages:

[0008] The refrigerant pipe is passed directly through the inside of the drum, and the inlet and outlet channels will not interfere with each other, thereby reducing mutual interference and helping to improve ice-making efficiency.

[0009] Preferably, the end of one end of the drum is also provided with a first support part on the outer periphery of the first section, and the end of the other end of the drum is also provided with a second support part on the outer periphery of the second section. The first support part and the second support part are used to support the drum to rotate together. At the same time, a first sealing ring is provided in the annular space between the first support part and the first section, and a second sealing ring is provided in the annular space between the second support part and the second section. When the first support part, the second support part and the drum rotate together, the assembly composed of the first support part, the second support part and the drum rotates relative to the refrigerant pipe, while the refrigerant pipe does not rotate.

[0010] Preferably, the first section is also provided with a first protective sleeve, the inner end of which is rotatably sleeved with the end of one end of the roller; the second section is also provided with a second protective sleeve, the inner end of which is rotatably sleeved with the end of the other end of the roller.

[0011] Preferably, the first protective sleeve extends outward and forms an annular space with the first support portion, in which a first sealing ring is arranged; the second protective sleeve extends outward and forms an annular space with the second support portion, in which a second sealing ring is arranged.

[0012] Preferably, the outer end of the first support portion is connected to a first end cap, the first section passes through the first end cap outward and can be rotatably engaged, and the outer end of the first protective sleeve abuts against the first end cap, and / or the outer end of the second support portion is connected to a second end cap, the second section passes through the second end cap outward and can be rotatably engaged, and the outer end of the second protective sleeve abuts against the second end cap.

[0013] Preferably, after the first end cover is connected to the outer end of the first support portion, the first end cover pushes the first protective sleeve inwardly through the abutment so that the inner end of the first protective sleeve can be rotatably engaged with the sleeve hole at the end of one end of the roller to reduce the exposed gap of the sleeve hole, and / or, after the second end cover is connected to the outer end of the second support portion, the second end cover pushes the second protective sleeve inwardly through the abutment so that the inner end of the second protective sleeve can be rotatably engaged with the sleeve hole at the end of the other end of the roller to reduce the exposed gap of the sleeve hole.

[0014] Preferably, the outer end of the first protective bushing is sleeved with a first gasket, and the outer end of the first protective bushing abuts against the first end cover, which means that the first gasket abuts against the first end cover, and / or the outer end of the second protective bushing is sleeved with a second gasket, and the outer end of the second protective bushing abuts against the second end cover, which means that the second gasket abuts against the second end cover.

[0015] Preferably, the refrigerant pipe is provided with an elastic structure, and the elastic structure is used to provide the elastic force required for the offset.

[0016] Preferably, the elastic structure includes a spring, which is arranged in the drum, and the first part, the spring, and the second part are arranged in sequence along the axial direction of the drum. The first part and the second part are connected by a spring, which provides an elastic force between the first part and the second part along the axial direction and in the outward direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of a shaved ice evaporator.

[0018] Figure 2 It is a three-dimensional schematic diagram of a refrigerant pipe.

[0019] Figure 3 The figure is a top view schematic diagram of a shaved ice evaporator.

[0020] Figure 4 It is the AA section view.

[0021] Figure 5 The schematic top view of a shaved ice evaporator with a scraper arranged around its circumference.

[0022] Figure 6 The invention is a three-dimensional schematic diagram of a shaved ice evaporator rotatably arranged on an ice-making support.

[0023] Figure 7 It is a top view schematic diagram of a component formed by welding a first supporting part and a second supporting part to a roller.

[0024] Figure 8 It is a BB cross-sectional view, and the second section of the refrigerant pipe is drawn to show the interval.

[0025] Fig. 9 It is a front view of a first section adopting an integrated structure (ie, the first protective sleeve is integrally arranged on the first section).

[0026] Fig.10 It is the CC section view.

[0027] As shown in the figure of the utility model: 1-roller, 2-refrigerant pipe, 3-first section, 4-inner part, 4.1-first part, 4.2-second part, 5-second section, 6-first support part, 7-second support part, 8-first sealing ring, 9-second sealing ring, 10-first protective bushing, 11-second protective bushing, 12-spacer, 13-first end cover, 14-second end cover, 15-first gasket, 16-second gasket, 17-scraper, 18-transmission gear, 19-ice making bracket, 20-first bearing, 21-second bearing, 22-inlet channel, 23-outlet channel, 24-outlet, 25-discharge outlet, 26-sleeve hole, 27-spring. DETAILED DESCRIPTION

[0028] In order to better understand the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numbers refer to the same elements.

[0029] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0030] It should also be understood that the terms “comprises,” “including,” “has,” “includes,” and “containing,” when used in this specification, indicate the presence of the described features, integers, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or combinations thereof.

[0031] like Figures 1 to 8As shown, a direct-injection slush ice evaporator is disclosed, which can be used in an ice maker. The slush ice evaporator includes a drum 1 and a refrigerant pipe 2. The refrigerant pipe 2 is used to circulate refrigerant. The refrigerant pipe 2 extends from one end of the drum 1 to the other end. The refrigerant pipe 2 is provided with a first section 3, an inner part 4 and a second section 5 in sequence from one end of the drum 1 to the other end. The first section 3 is rotatably sleeved with the end of one end of the drum 1, and the second section 5 is rotatably sleeved with the end of the other end of the drum 1. The inner part 4 is located in the drum 1; the end of one end of the drum 1 is also sleeved with a first section 3 on the outer periphery of the first section 3. The support portion 6 and the end portion of the other end of the drum 1 are also sleeved with a second support portion 7 on the outer periphery of the second section 5. The first support portion 6 and the second support portion 7 are used to support the drum 1 to rotate together. At the same time, a first sealing ring 8 is provided in the annular space 12 between the first support portion 6 and the first section 3, and a second sealing ring 9 is provided in the annular space 12 between the second support portion 7 and the second section 5. When the first support portion 6, the second support portion 7 and the drum 1 rotate together, the assembly composed of the first support portion 6, the second support portion 7 and the drum 1 rotates relative to the refrigerant pipe 2, while the refrigerant pipe 2 does not rotate, so that the refrigeration oil is not easy to leak.

[0032] In this disclosure, Figure 2 , 4 As shown, the inner part 4 includes a first part 4.1 and a second part 4.2 which are not directly connected. The first section 3 is connected to the first part 4.1 to form an inlet channel 22, and the second part 4.2 is connected to the second section 5 to form an outlet channel 23. The first part 4.1 is provided with an outlet 24, and the second part 4.2 is provided with a discharge port 25. The non-direct connection means that the refrigerant is directly sprayed into the drum 1 through the inlet channel 22 and the outlet 24, and the refrigerant absorbs heat and vaporizes and enters the outlet channel 23 through the discharge port 25 to be discharged from the drum 1. Figure 4 The arrows shown indicate the general direction of flow of the refrigerant.

[0033] In some embodiments, Figure 2 , 4 As shown, the outlet 24 is configured as through holes arranged in sequence along the axial direction of the first part 4.1. These through holes are arranged on the tube wall of the first part 4.1. This is more conducive to the distribution of the refrigerant in the drum 1 to improve the refrigeration efficiency. In addition, there is no need to additionally set up a capillary structure such as the capillary tube mentioned in the prior art.

[0034] The discharge port 25 is arranged as an opening at the left end of the second part 4.2, and the discharge port 25 is arranged close to the other end of the drum 1, which is further conducive to the distribution of the refrigerant in the drum 1 to improve the refrigeration efficiency.

[0035] According to the structural scheme disclosed in the present invention, the number of outlets 24, the flow aperture size, and the number of exhaust ports 25, the flow aperture size can be set according to the refrigerant flow demand. Currently, the number of outlets 24 is set to 4, and the number of exhaust ports 25 is 1, but the flow aperture is larger, and the flow aperture is the entire left end portion of the second part 4.2.

[0036] Of course, the specific structure and number of the outlet 24 and the specific structure and number of the discharge outlet 25 may also be other structures, which cannot be exemplified one by one.

[0037] In some embodiments, Figure 4 As shown, the drum 1 can be made of a seamless stainless steel pipe to obtain a cylinder body with openings at both ends, and then the first support part 6 and the second support part 7 are welded at both ends of the cylinder body respectively to cover the openings at both ends, so that the first support part 6, the second support part 7, and the drum 1 form an assembly, and the first support part 6 and the second support part 7 can support the drum 1 to rotate together. In addition, the production is simple, which is conducive to improving production efficiency.

[0038] In some embodiments, Figure 4 As shown, the first section 3 is also provided with a first protective sleeve 10, and the inner side end of the first protective sleeve 10 is rotatably sleeved with the end of one end of the drum 1; the second section 5 is also provided with a second protective sleeve 11, and the inner side end of the second protective sleeve 11 is rotatably sleeved with the end of the other end of the drum 1. In this way, during relative rotation, it is beneficial to protect the first section 3 and the second section 5, thereby preventing refrigerant leakage. In addition, due to the rotatable sleeve fitting, the first protective sleeve 10 and the second protective sleeve 11 also play a supporting role similar to a bearing. The first protective sleeve 10 and the second protective sleeve 11 can be regarded as a shaft sleeve, which is beneficial to support the entire refrigerant pipe 2, rather than relying on the support of the first sealing ring 8 and the second sealing ring 9.

[0039] like Fig. 9 , 10 As shown, the first protective sleeve 10 can be formed integrally on the first section 3 through a tube (such as a copper tube, a stainless steel tube, etc.), such as extrusion integral molding or turning molding on a pipe fitting, so that it is an integral structure. Of course, it is also possible to cover an independent first protective sleeve 10 on the first section 3 separately, and then weld the first section 3 and the first protective sleeve 10 together without leaving a sleeve gap, such as Figure 4 Similarly, the second protective sleeve 11 can be integrally formed on the second section 5 through a tube, so that it is an integral structure. Of course, an independent second protective sleeve 11 can also be sleeved on the second section 5, and then the second section 5 and the second protective sleeve 11 are welded to each other without a sleeve gap.

[0040] In some embodiments, Figure 4 As shown, the first protective bushing 10 is extended outward and forms an annular space 12 with the first support portion 6, in which the first sealing ring 8 is arranged, and the second protective bushing 11 is extended outward and forms an annular space 12 with the second support portion 7, in which the second sealing ring 9 is arranged. In this way, on the one hand, the first protective bushing 10 and the second protective bushing 11 are used to support the sealing ring, simplifying the structure, and on the other hand, the first protective bushing 10 and the second protective bushing 11 have sufficient length, thereby providing better protection for the first section 3 and the second section 5.

[0041] In some embodiments, Figure 1 , 4 As shown, the outer end of the first support part 6 is connected to the first end cover 13, the first section 3 passes through the first end cover 13 to the outside and can be rotatably matched, the outer end of the second support part 7 is connected to the second end cover 14, the second section 5 passes through the second end cover 14 to the outside and can be rotatably matched. In this way, the first support part 6 and the second support part 7 can be covered, thereby providing a certain degree of protection to prevent foreign matter from entering and damaging the sealing ring.

[0042] In some embodiments, Figure 4 , 7 As shown, the outer end of the first support portion 6 is connected with the first end cover 13, the first section 3 passes through the first end cover 13 outward and can be rotatably matched, the outer end of the first protective sleeve 10 is matched with the first end cover 13, and after the first end cover 13 is connected to the outer end of the first support portion 6, the first end cover 13 pushes the first protective sleeve 10 inward through the abutment to restore the inner end of the first protective sleeve 10 to the sleeve hole 26 at the end of one end of the drum 1 to reduce the gap exposed by the sleeve hole 26, that is, eliminate the interval 12, so that the gap only needs to meet the inner end of the first protective sleeve 10 and the sleeve hole 26 at the end of one end of the drum 1 to rotate with each other. In this way, the assembly problem of the sleeve hole 26 and the first protective sleeve 10 is simple and compact, and the production and manufacturing are convenient. At the same time, since the first protective sleeve 10 is integrated or connected with the refrigerant pipe 2, the above-mentioned improvement also realizes the axial fixation problem of the refrigerant pipe 2, simplifies the axial fixation structure, and is conducive to improving production efficiency.

[0043] Similarly, the above-mentioned structure can also be provided on one side of the second section 5, specifically, the outer end of the second support portion 7 is connected to the second end cover 14, the second section 5 passes through the second end cover 14 to the outside and can be rotatably matched, the outer end of the second protective sleeve 11 is abutted against the second end cover 14, and after the second end cover 14 is connected to the outer end of the second support portion 7, the second end cover 14 pushes the second protective sleeve 11 inward through the abutment to make the inner end of the second protective sleeve 11 and the sleeve holes 26 at the ends of the two ends of the drum 1 resume matching to reduce the gap exposed by the sleeve holes 26, that is, Figure 8 The interval 12 shown is eliminated. At the same time, since the second protective sleeve 11 and the refrigerant pipe 2 are also integrated or connected together, the above improvement better achieves the axial fixation of the refrigerant pipe 2, simplifies the axial fixation structure, and is conducive to improving production efficiency.

[0044] Through the above improvements, not only the axial fixation of the refrigerant pipe 2 is more reliable, which is beneficial to the yield rate of production, but also the assembly is greatly facilitated, which is beneficial to improving production efficiency.

[0045] In some embodiments, Figure 4 As shown, the outer end of the first protective bushing 10 is sleeved with a first gasket 15, and the outer end of the first protective bushing 10 abuts against the first end cover 13, which means that the first gasket 15 abuts against the first end cover 13, and / or the outer end of the second protective bushing 11 is sleeved with a second gasket 16, and the outer end of the second protective bushing 11 abuts against the second end cover 14, which means that the second gasket 16 abuts against the second end cover 14. In this way, during continuous rotation, the first section 3 and the second section 5 do not need to bear the rotational friction, and the first protective bushing 10 and the second protective bushing 11 do not need to bear the rotational friction, so that the refrigerant pipe 2 can be better maintained in a non-rotating state.

[0046] If friction-reducing gaskets are used, friction can also be reduced, making rotation smoother.

[0047] In some embodiments, Figure 2 , 4 As shown, the refrigerant pipe 2 is provided with an elastic structure, which is used to provide the elastic force required for the offset. The elastic structure can be a variety of structures, such as setting elastic members at both ends of the refrigerant pipe 2, or using elastic gaskets for the first gasket 15 and the second gasket 16, or setting the refrigerant pipe 2 as an elastic pipe, such as setting the inner part 4 as a spiral structure, and the spiral structure generates elastic force. Since it is impossible to cite examples one by one, all elastic structures applicable to the present disclosure can be adopted.

[0048] In this example, if Figure 2 , 4As shown, the elastic structure includes a spring 27, which is arranged in the drum 1, and the first part 4.1, the spring 27, and the second part 4.2 are arranged in sequence along the axial direction of the drum 1. The first part 4.1 and the second part 4.2 are connected by the spring 27, and the spring 27 provides an elastic force between the first part 4.1 and the second part 4.2 along the axial direction and in the outward direction. In this way, the structure is simpler.

[0049] Further, such as Figure 2 , 4 As shown, the first section 3 and the first part 4.1 are set as the first copper tube, and the second part 4.2 and the second section 5 are set as the second copper tube, that is, two copper tubes are set, and the spring 27 is connected between the two copper tubes. The right end of the first copper tube is closed, and the outlets 24 are arranged in sequence along the axial direction on the tube wall of the first copper tube. The left end of the second copper tube is open, and the opening forms the discharge outlet 25.

[0050] The present disclosure also provides an ice making machine, including a compressor, a scraper 17 and the shaved ice evaporator, such as Figure 5 As shown, the scraper 17 is arranged circumferentially of the shaved ice evaporator, and the compressor supplies refrigerant to the refrigerant pipe 2 of the shaved ice evaporator.

[0051] The refrigerant circulates through the compressor, so that the inner part 4 quickly cools the refrigeration oil, and the cooling of the refrigeration oil quickly cools the outer surface of the drum 1 to facilitate the formation of an ice layer. As the ice layer thickens, the scraper 17 will be released to the ice layer. Under the rotation of the drum 1, the scraper 17 cuts the ice layer to obtain shaved ice.

[0052] In some embodiments, Figure 6 As shown, the ice making bracket 19 is also included, and the direct-injection slush ice evaporator is installed on the ice making bracket 19. A first bearing 20 is provided between the first support portion 6 of the direct-injection slush ice evaporator and the ice making bracket 19, and a second bearing 21 is provided between the second support portion 7 of the direct-injection slush ice evaporator and the ice making bracket 19. The direct-injection slush ice evaporator rotates relative to the ice making bracket 19 through the first bearing 20 and the second bearing 21. In this way, the first bearing 20 and the second bearing 21 make the assembly composed of the first support portion 6, the second support portion 7, and the drum 1 rotate more stably.

[0053] like Figure 6 As shown, in order to drive the drum 1 to rotate, in this example, the second support portion 7 is provided with a transmission gear 18, which can be driven by an electric motor and then by a gear transmission structure, thereby further driving the second support portion 7, so that the assembly consisting of the first support portion 6, the second support portion 7 and the drum 1 rotates together.

[0054] When understanding the present invention, if necessary, the above structure can refer to other embodiments / attached Figure 1 And understand, no further elaboration here.

[0055] The above description is only an illustrative embodiment of the present invention, so any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent protection scope of the present invention are included in the patent protection scope of the present invention.

Claims

1. A direct-injection slush ice evaporator, comprising a drum (1), the outer periphery of the drum (1) being used for ice formation, characterized in that: It also includes a refrigerant pipe (2), which is used to circulate refrigerant. The refrigerant pipe (2) extends from one end of the roller (1) to the other end. The refrigerant pipe (2) is provided with a first section (3), an inner part (4) and a second section (5) in sequence from one end of the roller (1) to the other end. The first section (3) is rotatably sleeved with the end of one end of the roller (1), and the second section (5) is rotatably sleeved with the end of the other end of the roller (1). The inner part (4) is located in the roller (1); the inner part (4) includes a first part (4.1) and a second part (4.2) that are not directly connected. The first section (3) is connected to the first part (4.1) to form an inlet channel (22), and the second part (4.2) is connected to the second section (5) to form an outlet channel (23). The first part (4.1) is provided with an outlet (24), and the second part (4.2) is provided with an outlet (25). The non-direct connection means that the refrigerant is directly sprayed into the drum (1) through the inlet channel (22) and the outlet (24), and the refrigerant absorbs heat and vaporizes, then enters the outlet channel (23) through the outlet (25) to be discharged from the drum (1).

2. The direct-injection shaved ice evaporator according to claim 1, characterized in that: The end of one end of the roller (1) is also provided with a first support part (6) sleeved on the outer periphery of the first section (3), and the end of the other end of the roller (1) is also provided with a second support part (7) sleeved on the outer periphery of the second section (5). The first support part (6) and the second support part (7) are used to support the roller (1) to rotate together. At the same time, a first sealing ring (8) is provided in the annular space (12) between the first support part (6) and the first section (3), and a second sealing ring (9) is provided in the annular space (12) between the second support part (7) and the second section (5). When the first support part (6), the second support part (7) and the roller (1) rotate together, the assembly composed of the first support part (6), the second support part (7) and the roller (1) rotates relative to the refrigerant pipe (2), while the refrigerant pipe (2) does not rotate.

3. A direct-injection shaved ice evaporator according to claim 1 or 2, characterized in that: The first section (3) is also provided with a first protective sleeve (10), the inner end of which is rotatably sleeved with the end of one end of the roller (1); the second section (5) is also provided with a second protective sleeve (11), the inner end of which is rotatably sleeved with the end of the other end of the roller (1).

4. The direct-injection shaved ice evaporator according to claim 3, characterized in that: The first protective sleeve (10) is extended outward and forms an annular space (12) with the first support portion (6), and a first sealing ring (8) is arranged in the annular space (12); the second protective sleeve (11) is extended outward and forms an annular space (12) with the second support portion (7), and a second sealing ring (9) is arranged in the annular space (12).

5. The direct-injection shaved ice evaporator according to claim 2, characterized in that: The outer end of the first support portion (6) is connected to a first end cover (13), the first section (3) passes through the first end cover (13) outwardly and can be rotatably engaged, the outer end of the first protective sleeve (10) is in abutment with the first end cover (13), and / or, the outer end of the second support portion (7) is connected to a second end cover (14), the second section (5) passes through the second end cover (14) outwardly and can be rotatably engaged, and the outer end of the second protective sleeve (11) is in abutment with the second end cover (14).

6. The direct-injection shaved ice evaporator according to claim 5, characterized in that: After the first end cover (13) is connected to the outer end of the first support portion (6), the first end cover (13) pushes the first protective sleeve (10) inwardly through the abutment so that the inner end of the first protective sleeve (10) can be rotatably matched with the sleeve hole (26) at the end of one end of the roller (1) to reduce the gap exposed by the sleeve hole (26), and / or, after the second end cover (14) is connected to the outer end of the second support portion (7), the second end cover (14) pushes the second protective sleeve (11) inwardly through the abutment so that the inner end of the second protective sleeve (11) can be rotatably matched with the sleeve hole (26) at the end of the other end of the roller (1) to reduce the gap exposed by the sleeve hole (26).

7. The direct-injection shaved ice evaporator according to claim 5, characterized in that: The outer end of the first protective sleeve (10) is sleeved with a first gasket (15), and the outer end of the first protective sleeve (10) abuts against the first end cover (13), which means that the first gasket (15) abuts against the first end cover (13), and / or the outer end of the second protective sleeve (11) is sleeved with a second gasket (16), and the outer end of the second protective sleeve (11) abuts against the second end cover (14), which means that the second gasket (16) abuts against the second end cover (14).

8. A direct-injection shaved ice evaporator according to claim 5, 6 or 7, characterized in that: The refrigerant pipe (2) is provided with an elastic structure, and the elastic structure is used to provide the elastic force required for the offset.

9. The direct-injection shaved ice evaporator according to claim 8, characterized in that: The elastic structure comprises a spring (27), which is arranged in the drum (1); the first part (4.1), the spring (27), and the second part (4.2) are arranged in sequence along the axial direction of the drum (1); the first part (4.1) and the second part (4.2) are connected by the spring (27); and the spring (27) provides an elastic force between the first part (4.1) and the second part (4.2) along the axial direction and in an outward direction.

10. An ice making machine, comprising a compressor, a scraper (17) and a direct-injection type slush ice evaporator, wherein the scraper (17) is arranged circumferentially of the direct-injection type slush ice evaporator, and the compressor supplies refrigerant to a refrigerant pipe (2) of the direct-injection type slush ice evaporator, characterized in that: The direct-injection type slushy ice evaporator adopts the direct-injection type slushy ice evaporator according to any one of claims 1 to 9.

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